Re: JiffyDOS and the 1541-II Drive

From: Jack (
Date: 2004-07-12 13:41:52

On Sun, 11 Jul 2004 23:49:36 +0300, you wrote:

>On Sun, Jul 11, 2004 at 01:40:31AM -0400, Jack wrote:
>> >An original JiffyDOS package normally has both the original CBM DOS and
>> >JiffyDOS switchable for compatability reasons,...
>> Then this means that the drive he sold me has a hacked/bootleg/pirate
>> JiffyDOS chip.  Is this assumption correct?
>Not necessarily.  The 1541 clone Oceanic OC-118N contains a 23128 ROM (not
>sure if it's PROM or mask-programmed ROM) with the CMD logo stamped on it.
>Some of the data or address lines are permuted, presumably because earlier
>versions of the drive had an unauthorized copy of CBM DOS.

The drive in question is a Commodore 1541-II, not a 1541 clone. It
contains a 27128 UV erasable EPROM  with a label that says:

  JiffyDOS  v6.01 1989

In any case, I have anther JD equipped 1541-II coming in soon. It does
have a switch and I'll compare both JD chips.  The only reason I'm
buying used Jiffydos drives from other sources is because there are so
many reports Maurice is not delivering.  

       Message was sent through the cbm-hackers mailing list

Archive generated by hypermail pre-2.1.8.